Shadow mapping reenabled. Removed legacy API from pc.scene.Scene.
Shadow mapping reenabled. Removed legacy API from pc.scene.Scene.

--HG--
branch : feature/sortable-meshes

sanyaade-teachings/engine,guycalledfrank/engine,shinate/engine,3DGEOM/engine,playcanvas/engine,sereepap2029/playcanvas,shinate/engine,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,aidinabedi/playcanvas-engine,nizihabi/engine,RainsSoft/engine,3DGEOM/engine,RainsSoft/engine,H1Gdev/engine,maxwellalive/engine,horryq/engine-1,horryq/engine-1,horryq/engine-1,sanyaade-teachings/engine,MicroWorldwide/PlayCanvas,sanyaade-teachings/engine,RainsSoft/engine,guycalledfrank/engine,SuperStarPL/engine,sereepap2029/playcanvas,nizihabi/engine,maxwellalive/engine,shinate/engine,3DGEOM/engine,H1Gdev/engine,playcanvas/engine,SuperStarPL/engine,SuperStarPL/engine,maxwellalive/engine,nizihabi/engine,sereepap2029/playcanvas